<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="	https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-if='list.length>0'>
          <tr v-for="item in list">
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red : item.price > 100}">{{item.price}}</td>
            <td>{{item.time}}</td>
            <td><a href="#" @click.prevent="del(item.id)">删除</a></td>
          </tr>
          <tr style="background-color: #EEE">
              <td>统计:</td>
              <td colspan="2">总价钱为: {{total}}</td>
              <td colspan="2">平均价: {{avg}}</td>
        </tr>
        </tbody>
        <tfoot v-else>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline row g-3">
        <div class="form-group col-3">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称" v-model.trim="name"/>
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group col-3">
          <div class="input-group">
            <input type="number" class="form-control" placeholder="价格" v-model.trim.number="price"/>
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <div class="col-auto">
            <button class="btn btn-primary" @click.prevent="add">添加资产</button>
        </div>
      </form>
    </div>
  </div>
  <script src="./vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        name: "", // 名称
        price: 0, // 价格
        list: JSON.parse(localStorage.getItem('list')) || [
          { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
          { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
          { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
          { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
        ],
      },
      methods: {
        // 删除
        del(i){
            this.list = this.list.filter(item=> item.id != i)

        },
        // 添加
        add(){
            // 获取数据
            console.log(this.name, this.price)
            if(this.name === '' || this.price <= 0){
                alert('请输入正确的数据')
                return
            }
            this.list.push({
                id: this.list.length + 100,
                name: this.name,
                price: this.price,
                time: new Date().getFullYear() + '-' + (new Date().getMonth() + 1) + '-' + new Date().getDate()
            })
        } 
      },
      computed:{
        // 总价
        total(){
            return this.list.reduce((total, item)=> total + item.price, 0)
        },
        // 平均价
        avg(){
            return (this.total / this.list.length).toFixed(2)
        }
      },
      watch:{
        // 监听数据变化
        list:{
            handler(){
                console.log('数据变化了')
                localStorage.setItem('list', JSON.stringify(this.list))
            },
            deep: true
        }
      }
    })
  </script>


</body>

</html>